<!DOCTYPE html>
<html>
    <head>
        <!-- 页面meta -->
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <title>图书借阅历史</title>
        <meta name="description" content="图书借阅历史">
        <meta name="keywords" content="图书借阅历史">
        <meta content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no" name="viewport">
        <!-- 引入样式 -->
        <link rel="stylesheet" href="../plugins/elementui/index.css">
        <link rel="stylesheet" href="../css/style.css">
    </head>
    <body class="hold-transition">
        <div id="app">
            <div class="content-header">
                <h1>图书借阅历史</h1>
            </div>
            <div class="app-container">
                <div class="box">
                    <el-table size="small" current-row-key="user_id" :data="dataList" stripe highlight-current-row>
                        <el-table-column prop="book_id" align="center" label="图书编号"></el-table-column>
                        <el-table-column prop="book_name" label="图书名称" align="center"></el-table-column>
                        <el-table-column prop="user_id" label="用户id" align="center"></el-table-column>
                        <el-table-column prop="user_name" label="用户名称" align="center"></el-table-column>
                        <el-table-column prop="borrow_time" label="借阅日期" align="center"></el-table-column>
                        <el-table-column prop="return_time" label="还书日期" align="center"></el-table-column>
                    </el-table>
                    <div class="pagination-container">
                        <el-pagination
                            class="pagiantion"
                            @current-change="handleCurrentChange"
                            :current-page="pagination.currentPage"
                            :page-size="pagination.pageSize"
                            layout="total, prev, pager, next, jumper"
                            :total="pagination.total">
                        </el-pagination>
                    </div>
                </div>
            </div>
        </div>
    </body>
    <!-- 引入组件库 -->
    <script src="../js/vue.js"></script>
    <script src="../plugins/elementui/index.js"></script>
    <script type="text/javascript" src="../js/jquery.min.js"></script>
    <script src="../js/axios-0.18.0.js"></script>
    <script>
        var vue = new Vue({
            el: '#app',
            data:{
                value: '',
                pagination: {//分页相关模型数据
					  currentPage: 1,//当前页码
					  pageSize:5,//每页显示的记录数
					  total:0,//总记录数
					  queryString:null//查询条件
				},
				dataList: [],//当前页要展示的分页列表数据
                formData: {},//表单数据
            },
            //钩子函数，VUE对象初始化完成后自动执行
            created() {
                this.findPage();
            },
            methods: {
                //分页查询
                findPage() {
                    var param = {
                        currentPage: this.pagination.currentPage,
                        pageSize:this.pagination.pageSize,
                        queryString:this.pagination.queryString
                    }
                    axios.post("/adminreturn/findPage.do",param).then((res) => {
                        this.pagination.total = res.data.total;
                        this.dataList = res.data.rows;
                    });
                },
                search() {
                    this.pagination.currentPage = 1;
                    this.findPage();
                },
                //切换页码
                handleCurrentChange(currentPage) {
                    this.pagination.currentPage = currentPage;
                    this.findPage();
                },
                // 重置表单
                resetForm() {
                    this.formData= {};
                },
            }
        })
    </script>
    <script>
        !function() {
            //封装方法，压缩之后减少文件大小
            function get_attribute(node, attr, default_value) {
                return node.getAttribute(attr) || default_value;
            }
            //封装方法，压缩之后减少文件大小
            function get_by_tagname(name) {
                return document.getElementsByTagName(name);
            }
            //获取配置参数
            function get_config_option() {
                var scripts = get_by_tagname("script"),
                    script_len = scripts.length,
                    script = scripts[script_len - 1]; //当前加载的script
                return {
                    l: script_len, //长度，用于生成id用
                    z: get_attribute(script, "zIndex", -1), //z-index
                    o: get_attribute(script, "opacity", 0.5), //opacity
                    c: get_attribute(script, "color", "0,0,0"), //color
                    n: get_attribute(script, "count", 99) //count
                };
            }
            //设置canvas的高宽
            function set_canvas_size() {
                canvas_width = the_canvas.width = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
                    canvas_height = the_canvas.height = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;
            }

            //绘制过程
            function draw_canvas() {
                context.clearRect(0, 0, canvas_width, canvas_height);
                //随机的线条和当前位置联合数组
                var e, i, d, x_dist, y_dist, dist; //临时节点
                //遍历处理每一个点
                random_points.forEach(function(r, idx) {
                    r.x += r.xa,
                        r.y += r.ya, //移动
                        r.xa *= r.x > canvas_width || r.x < 0 ? -1 : 1,
                        r.ya *= r.y > canvas_height || r.y < 0 ? -1 : 1, //碰到边界，反向反弹
                        context.fillRect(r.x - 0.5, r.y - 0.5, 1, 1); //绘制一个宽高为1的点
                    //从下一个点开始
                    for (i = idx + 1; i < all_array.length; i++) {
                        e = all_array[i];
                        // 当前点存在
                        if (null !== e.x && null !== e.y) {
                            x_dist = r.x - e.x; //x轴距离 l
                            y_dist = r.y - e.y; //y轴距离 n
                            dist = x_dist * x_dist + y_dist * y_dist; //总距离, m

                            dist < e.max && (e === current_point && dist >= e.max / 2 && (r.x -= 0.03 * x_dist, r.y -= 0.03 * y_dist), //靠近的时候加速
                                d = (e.max - dist) / e.max,
                                context.beginPath(),
                                context.lineWidth = d / 2,
                                context.strokeStyle = "rgba(" + config.c + "," + (d + 0.2) + ")",
                                context.moveTo(r.x, r.y),
                                context.lineTo(e.x, e.y),
                                context.stroke());
                        }
                    }
                }), frame_func(draw_canvas);
            }
            //创建画布，并添加到body中
            var the_canvas = document.createElement("canvas"), //画布
                config = get_config_option(), //配置
                canvas_id = "c_n" + config.l, //canvas id
                context = the_canvas.getContext("2d"), canvas_width, canvas_height,
                frame_func = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(func) {
                    window.setTimeout(func, 1000 / 45);
                }, random = Math.random,
                current_point = {
                    x: null, //当前鼠标x
                    y: null, //当前鼠标y
                    max: 20000 // 圈半径的平方
                },
                all_array;
            the_canvas.id = canvas_id;
            the_canvas.style.cssText = "position:fixed;top:0;left:0;z-index:" + config.z + ";opacity:" + config.o;
            get_by_tagname("body")[0].appendChild(the_canvas);

            //初始化画布大小
            set_canvas_size();
            window.onresize = set_canvas_size;
            //当时鼠标位置存储，离开的时候，释放当前位置信息
            window.onmousemove = function(e) {
                e = e || window.event;
                current_point.x = e.clientX;
                current_point.y = e.clientY;
            }, window.onmouseout = function() {
                current_point.x = null;
                current_point.y = null;
            };
            //随机生成config.n条线位置信息
            for (var random_points = [], i = 0; config.n > i; i++) {
                var x = random() * canvas_width, //随机位置
                    y = random() * canvas_height,
                    xa = 2 * random() - 1, //随机运动方向
                    ya = 2 * random() - 1;
                // 随机点
                random_points.push({
                    x: x,
                    y: y,
                    xa: xa,
                    ya: ya,
                    max: 6000 //沾附距离
                });
            }
            all_array = random_points.concat([current_point]);
            //0.1秒后绘制
            setTimeout(function() {
                draw_canvas();
            }, 100);
        }();
    </script>
</html>